midf thottle pop


5 replies to this topic
  • mikey m

Posted May 04, 2007 - 09:22 AM

#1

my 01 wr426 at id say mid trottle runs kinda ruff like a miss pop out exhaust. has had all mods dosnt matter if pipe insert is in or out. also i live at lake tahoe and elevation is 6500 ft. any ideas?

  • rheynard

Posted May 04, 2007 - 05:54 PM

#2

Just don't assume its lean, its probally rich. Try raising your clip / lowering your needle, thus leaning out the range. GL Oh there are plenty of threads on these issues, try a search....many pages.

  • loopsrider

Posted May 04, 2007 - 07:43 PM

#3

I'd say it's rich if it has stock jetting and you are at 6500 feet.

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  • mikey m

Posted May 06, 2007 - 07:15 AM

#4

hey thanks! i think its rich too.had it down near 3000ft once and dont think i noticed prob. thease carbs sure shoe horned into bike arnt they.

  • rheynard

Posted May 06, 2007 - 07:48 AM

#5

Very tight, I was able to adjust my needle with out loosning the boots. Just take the top engine mounts off and you can get to the top of the carb and neddle. GL

  • loopsrider

Posted May 06, 2007 - 06:02 PM

#6

hey thanks! i think its rich too.had it down near 3000ft once and dont think i noticed prob. thease carbs sure shoe horned into bike arnt they.



If you lean it back be careful when you ride at a lower altitude. I haven't heard of a 4 stroke dirtbike melting down from a lean condition, but I'm sure it happens.


I've got a 426 and I think they are pretty finicky on the fuel delivery. I can almost guess what my GPS altimeter says by listening to how much popping it makes. I run normally at @1200-1500ft above sea level. When I get around 3500-4000ft it gets really noticeable.




 
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